Five Novel Coordination Polymers Based on a C-Centered Triangular Flexible Ligand

Five new complexes of the wholly deprotonated C-centered triangular flexible ligand tris(p-carboxyphenyl)methane (TCOPM), namely, {[Zn4O(TCOPM)(2)(H2O)(2)]center dot 8H(2)O center dot 3DMF}(n) (1), {[Mn-3(TCOPM)(2)(H2O)(2)]}(n) (2), {[Cd-3(TCOPM)(2)(DMF)(H2O)(3)]center dot 3H(2)O}(n)(3), {[Cd-3(TCOPM)(2)(4,4'-bipy)] center dot 2H(2)O center dot 2 D M F}(n) (4), and {[Cd-4(TCOPM)(2)(dpyb)(3)(NO2)(2)center dot(H2O)(2)]center dot 5H(2)O}(n) (5), are synthesized in the presence or absence of auxiliary 4,4'-bipyridine (4,4'-bipy) and 1,4-di(pyridine-4-yl)benzene (dpyb) ligands by solvothennal reaction. The complexes were characterized by elemental analysis, IR spectroscopy, thermogravimetric analysis, and X-ray single-crystal diffraction. Compound 1 exhibits an unusual three-dimensional (3D) framework containing a one-dimensional (1D) channel based on a Zn4O cluster, with (4.8(2))(4(2).6)(4(3). 6. 8(10).10) net topology. 2 displays a 3D network structure with tfz-d topology type. Compound 3 reveals double-layered two-dimensional (2D) framework. Compound 4 possesses a 3D structure with a (3,3,10)-connected net. 5 is a 3D structure with (6(23).8(5))(6(3))(2)(6(5).8) topology. The photochemical properties and emission decay lifetimes were determined in the solid state at room temperature. The luminescent properties of compounds 1 and 3-5 are discussed in detail. The N-2 gas adsorption of compound 1 exhibits type-I sorption behavior.